Lubricating apparatus



June 24, 1930. w. l. JONES LUBRICATING APPARATUSv Filed OCl'.. 9. 1926 Qmmm vm A Q Q m,

.Patented Juneau,1.9aof- .l 1,767,527

UNIT-Eu sr-TEsPATsNT OFFICE* WALTER I.; JONES, or ARLINGTON, MA'sSAcHUSETTS, AssIGNoR, PY MESNR AssIGN-- MENTS, To ALEMITE CORPORATION, or oRIAGo, ILLINOIS, A coRPoRATIoN or LUPRIGATING APPARATUS Application iled October 9, 1926. Serial No. 140,493. i

This invention aims to provide improve- Seal (Fig. 1 by aspring 18. The valve is ments in lubricating apparatus of the type' provided with a forwardly projecting Stem generally known as a lubricant gun. y 12.), which may be engaged by the end of the In the drawings, which illustrate a prenlpple, during coupling operation, tounseat F 5 ferred embodiment of my invention: the valve. The fronthead 6 is bored to pro- 15g' Figure 1 is a longitudinal section through vide `a chamber 20 of somewhat larger crossthe gun, portions thereof being in elevation, sectional area than the chamber 8. Both and showing the relation of parts when the chambers arealigned andyseparated by a gun is notin operation; partition 20a. A differential piston having f Fig. 2 is an enlarged Section of the disa portion 21 tting the wall of the chamber fao* charge end of the gun engaged with a cop- 20, and a reduced portion 22, which may it eratingnipple and being partly in elevation, `the wall of the chamber 8, is reciprocable in also Showing ie relation of parts when luthe chambers 8 and 20, as shown in Figs. 1 bricant is forced to the nipple under rela'- and 2. A spring 23 is positioned in the tively high potential pressure; and chamber 20 and normally urges the piston '85 F 1g. 3 1s a section on the line 3-3 of tinto the position shown in Fig. 1, the free end Fig. 2. Y of the reduced portion 21 being positioned Referring to the embodiment of my invenbetween two hat washers 24 and 25'. The tion illustrated by the drawings, I have washer 24 surrounds the reduced portion 22 2o shown in Fig. l a barrel 1, having a piston 2 of thepiston at all times to prevent passage 70 adapted tobe recprocated therein by a pisof lubricant around the reduced portion into ton stem 3, screw threaded vinto the rear the chamber- 20. Normally there is a free head 4. A handle 5 is attached to the outer passage around the end of the reduced porend of the stem to provide fonturning there tion. 22 through the Washer 25 so that lubri- 25 of in either direction. cant may pass from the barrel through-the A front head 6 is attached'to the frontend passage 26 in the head 6 directly into the of the barrel l, and this in turn carries a part high pressure chamber 8. -A plug 27 is 7 which is bored yto provide a high' pressureA screwed into the end of the head 6 to close chamber 8 of relatively small cross-sectional the chamber 2O so that the sprig 23 cannot 3o area. The part 7 has a nozzle part 9 secured urge the piston 21 out of the chamber.A Holes so to it for cooperative engagement with a nip- 28 are drilled through the plug 27 to admit ple 10, as shown by ig. 2. lubricaa'nt into the chamber 20 for operation he nozzle 9 may'. be of any suitable conof the piston. struction which will cooperate with the par- Assuming that the parts of the gun are in a5 ticular type of nipple to be used therewith. the relation to each other shown in Fig. 1, the 85 For purposes of illustration, however, Iha've gun may be engaged with the nipple lO'by selected a nozzle part 9 which is bored and .introducing the nozzle over the smooth end provided with internal threads 11 for 'cou- 14 of the' nipple and turning the gun, as va pling engagement with the male threads 1 2 unit, in a clockwise direction. The threads 40 of the nipple, as shown in Fig. 2. Beyond 11 of the nozzle v9 will then vengage the 90 the female threads 11,1 haveprovided a hat 1threads 12 ofthe nipple'and draw the nozzle washer 13, which is adapted to surround the over the nipple as shown in Fig. I2. During smooth end portion 14 o`f.the nipple and be the coupling operation the Smooth portion-14 pressed tightly thereagainst by the lubricant of the nipple passes through an aperture in to provide a lubricant-tight seal between the `the hatA washer 13 and the end of the nipple gun and nipple. f u engages with the stemi19 of the valve v17, The outer end of the part 7 is provided` thereby unseating the valve as illustrated. with a relatively large bore into which is-" Rotation of the handle inla clockwise diy tteda part 15 presenting a valve' Seat 16. rection relative to the remainder of the gun, A valve 17 is normally pressed against the after coupling has been completed, forces the 160 piston 2 inwardlyrelativewto the barrel 1 thereby forcing lubricant under relatively low potential pressure from' the barrel 1. The

lubricant flows through the passage 26 into and through the high pressure chamber 8, past the closure valve 17 and past the ball check valve 29 (Fig. 2) into the lubricant-receiving nipple 10. Lubricant forced to a bearing through the nipple 10 in the manner above described will be under suilicient pressure to lubricate a bearing which is free from dirt'or' hardened lubricant, and the spring 23 is strong enough to preventl operation of l'the differential piston when the bearing is free. If, however, a bearing is clogged and cannot be lubricated by lubricant under low pressure, the pressure of the lubricant in the chamber 8 vmay be greatly increased bythe forward movement. of the diie'rential pison to compress the lubricant in the chamV er 8. i f- :While heretofore a certain amount of manip'ulation was required to increasethe pressure of lubricant which could be ejected from a given gun, this gun is automatic-in its operation and increased pressure is a natural result when a tight bearing is reached.

Assuming that the gun is connected to a nipple in the same manner as above de scribed, but that the nipple is in this instance connected to` aib aringwhich cannot receive ,lubricant under he lowptential pressure,

the first thing that happens when the handle 5 is turned in a clockwise direction is the compressing 'of the lubricant between the bearing Vand the piston 2 until the pressure is suiicient to move the piston in the cham'- bers 20` and 8. 'As the reducedportion 22 of the piston moves forwardly, it enters an ap- A erture through'the hat washer -25 and cuts "oi the supply of lubricant.y From this point on the lubricant trapped inthe chamber 8 is V`compressedxuntil the potential pressure4 is greatenough to dislodge the foreign matter 1n the bearing andflow freely thereto.

-After `a bearing has been lubricated by` v*lubricant under-high pressure, the handley 5 should beturne'dgin a contraclockwisedirec 'tron suiciently t'o 'relieve the pressure of the lubricant in thebarrel `2 so that the. spring 23=may move the dierentialpiston to its ',normal position.` The gun'isthen readyfor ffurthero' ration. y j

-VVhile have''hown and described a preferred-embodiment of my invention, it should be understood that I have done lso for purfposes of clarification 'rather' than limitation,

myinvention Abeing best defined in the. fol- `lowing claims. 1 'Y v `1. AA lubricant comp)ressork comprising a I low pressure cylinder, a piston` insaid cylinder, a high pressure` cylinder in communi-v cation with said low pressurebylinder, a hgh pressure piston in' said highpressure cylin er operating der in communication with said low pressurel a dierential piston exposed to the pressure of lubricant in said low pressure cylinder,

cylinder and reciprocable in said high pressure cylinder for discharging lubricant rom` said high pressure cylinder upon the creation of a predetermined pressure in said low press'ure cylinder, and interlocking means r1g1d with said high pressure cylinder, said inter' locking means operated to interlock with a lubricant-receiving nipple upon movement of v said handle -in lubricant-[discharging direction.

3. Lubricatingapparatus comprising, in.

combination, a'supply barrel, meansl for compressin the lubricant in said barrel, a nozzle for ma ing a quick detachable lubrlcantsaid means rigidtightlengagement with a lubricant-receiving l nipple, said nozzle rigid with said supply barrel, meansproviding a -high pressure chamber of relatively small cross-sectional area and a chamber of larger cross-sectional area aligned with said.irst'-mentioned chamber, conduit means connecting said first-mentioned chamber with the supply barrel, a diferential piston operableby the pressure of the lubricant in said barrel toforce lubricant V -from said first-mentioned chamber under increasedpotential pressure, and a handle for the compressing means in said barrel and connecting said apparatus with a lubricant-receiving nipple. t

f4. Lubricating apparatus comprising, in

combination,I a supply' barrel, means for com- 115 pressing the lubricant in said supply barrel,

lll

a nozzle for making a qui'ck'detachable luf bricantftightengagement with a lubricant` nreceiving'nipple, means providing a high pressure chamber of relatively -small crossnal area, a chamber of larger cross-secsaid first-mentlone'd sect1 -tiona area aligned with chamber, conduit means connecting said firstmentioned chamber/.with the supply barrel, a diierential piston operable bythe pressure of the lubricant in said barrel tol force lubricant from said irst-mentioned chamberfunder substantially increased potential pressure, 'an Linwardly opening closure valve at the outer end of said first-mentioned chamber orpreventing escape of lubricant therefrom I' when the nozzle is not engaged with a nipple, and a single means for operating said compressing means and said nozzle to effect a connectlon with a lubricant-receiving nipple A and force lubricant thereinto.

5. In high pressure lubricating apparatus of the class described, asupply barrel, means for compressin the lubricant in said barrel, a nozzle for ma ing a quick detachable lubricant-tight engagement with a lubricant-receiving nipple, means sure chamber of relatively small cross-sectional area, a chamber of larger cross-sectional area aligned with said first-mentioned chamber, conduit means connecting said first-mentioned chamber with the supply barrel and a differential piston operable by the pressure of the lubricant in said barrel to force lubricant from said tial pressure, and laflexible washer intersecting said first-mentioned chamber in front of i the point where said conduit empties-into i tial pressure.

under relatively nlpple, and a said chamber thereby to provide for lubricant-tight engagement with the reduced ortion of said piston to prevent passage oflubricant around said piston when forcing lubricant from said chamber-under highpoten- 6. Inhigh pressure lubrcatingapparatus of the class described, a supply barrel, means for compressing the lubricant in said barrel, a nozzle for means providing ahigh tional area aligned with said first-mentioned chamber, separate passages connecting said chambers with the under pressuretherefrom, a differential pist0n operable in said chambers, a spring adapted to overcome movement of said piston until the pressure of the lubricant is insufficient to force lubricant into the nipple, the lubricant .under pressure thereby acting upon said piston in said second chamber to force lubricant Y, increased `potential pressure from said'rst-mentioned chamber to the hat-Washer ment Withthe reduced portion of sai from` said first-mentioned chamber, said spring also acting to return said pistn after its operation and upon reduction ofthe pressuce inesaid barrel. In testimony whereof, name to this specification.

providing a high presrst-mentioned i c hamber under substantially increased potenmaking a quick detachable lubricant-tight engagement with a lubricant- `receiving nipple, 'pressure chamber of relatively small cross-v sectional area,

av chamber of larger cross-sec#- barrel to receive lubricant" intersecting said A first-,mentioned chamber for annular en 'agevton to prevent leakage of lubricant by sald y piston in either direction when being forced Il have signedfmy,

WALTER JONES, A Y 

